Remove deprecated sys._enablelegacywindowsfsencoding #149595

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1. StanFromIreland

   self-assigned this

   on May 9, 2026
2. StanFromIreland

   added

   type-featureA feature request or enhancementA feature request or enhancement

   stdlibStandard Library Python modules in the Lib/ directoryStandard Library Python modules in the Lib/ directory

   on May 9, 2026
3. methane commented on May 11, 2026

   

   methane

   on May 11, 2026

   Member

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   Mercurial uses it.

   https://foss.heptapod.net/mercurial/mercurial-devel/-/blob/02ed53def57d9cd729d243744ce28a88e7280f53/mercurial/pycompat.py#L113

   I suggested to them to use environment variables three years ago, but I got no response from them.

   https://foss.heptapod.net/mercurial/mercurial-devel/-/work_items/6829

   Can one of the core developers talk to the Mercurial developers?
4. StanFromIreland commented on May 11, 2026

   

   StanFromIreland

   on May 11, 2026

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   I think removing may be a good push for them to actually fix it. I'm afraid I don't know any Mercurial people.

   ❤️React with ❤️1Reacted by Inada Naoki
5. StanFromIreland

   added a commit that references this issue on May 12, 2026

   gh-149595: Remove the `sys._enablelegacywindowsfsencoding()` function (…

   ...

   6a0be13
6. StanFromIreland

   closed this as completedon May 12, 2026